1 /* 1 /*
2 * Device operations for the pnfs client. 2 * Device operations for the pnfs client.
3 * 3 *
4 * Copyright (c) 2002 4 * Copyright (c) 2002
5 * The Regents of the University of Michigan 5 * The Regents of the University of Michigan
6 * All Rights Reserved 6 * All Rights Reserved
7 * 7 *
8 * Dean Hildebrand <dhildebz@umich.edu> 8 * Dean Hildebrand <dhildebz@umich.edu>
9 * Garth Goodson <Garth.Goodson@netapp.com> 9 * Garth Goodson <Garth.Goodson@netapp.com>
10 * 10 *
11 * Permission is granted to use, copy, create 11 * Permission is granted to use, copy, create derivative works, and
12 * redistribute this software and such deriva 12 * redistribute this software and such derivative works for any purpose,
13 * so long as the name of the University of M 13 * so long as the name of the University of Michigan is not used in
14 * any advertising or publicity pertaining to 14 * any advertising or publicity pertaining to the use or distribution
15 * of this software without specific, written 15 * of this software without specific, written prior authorization. If
16 * the above copyright notice or any other id 16 * the above copyright notice or any other identification of the
17 * University of Michigan is included in any 17 * University of Michigan is included in any copy of any portion of
18 * this software, then the disclaimer below m 18 * this software, then the disclaimer below must also be included.
19 * 19 *
20 * This software is provided as is, without r 20 * This software is provided as is, without representation or warranty
21 * of any kind either express or implied, inc 21 * of any kind either express or implied, including without limitation
22 * the implied warranties of merchantability, 22 * the implied warranties of merchantability, fitness for a particular
23 * purpose, or noninfringement. The Regents 23 * purpose, or noninfringement. The Regents of the University of
24 * Michigan shall not be liable for any damag 24 * Michigan shall not be liable for any damages, including special,
25 * indirect, incidental, or consequential dam 25 * indirect, incidental, or consequential damages, with respect to any
26 * claim arising out of or in connection with 26 * claim arising out of or in connection with the use of the software,
27 * even if it has been or is hereafter advise 27 * even if it has been or is hereafter advised of the possibility of
28 * such damages. 28 * such damages.
29 */ 29 */
30 30
31 #include <linux/export.h> 31 #include <linux/export.h>
32 #include <linux/nfs_fs.h> 32 #include <linux/nfs_fs.h>
33 #include "nfs4session.h" 33 #include "nfs4session.h"
34 #include "internal.h" 34 #include "internal.h"
35 #include "pnfs.h" 35 #include "pnfs.h"
36 36
37 #include "nfs4trace.h" 37 #include "nfs4trace.h"
38 38
39 #define NFSDBG_FACILITY NFSDBG_PNFS 39 #define NFSDBG_FACILITY NFSDBG_PNFS
40 40
41 /* 41 /*
42 * Device ID RCU cache. A device ID is unique 42 * Device ID RCU cache. A device ID is unique per server and layout type.
43 */ 43 */
44 #define NFS4_DEVICE_ID_HASH_BITS 5 44 #define NFS4_DEVICE_ID_HASH_BITS 5
45 #define NFS4_DEVICE_ID_HASH_SIZE (1 << 45 #define NFS4_DEVICE_ID_HASH_SIZE (1 << NFS4_DEVICE_ID_HASH_BITS)
46 #define NFS4_DEVICE_ID_HASH_MASK (NFS4_ 46 #define NFS4_DEVICE_ID_HASH_MASK (NFS4_DEVICE_ID_HASH_SIZE - 1)
47 47
48 48
49 static struct hlist_head nfs4_deviceid_cache[N 49 static struct hlist_head nfs4_deviceid_cache[NFS4_DEVICE_ID_HASH_SIZE];
50 static DEFINE_SPINLOCK(nfs4_deviceid_lock); 50 static DEFINE_SPINLOCK(nfs4_deviceid_lock);
51 51
52 #ifdef NFS_DEBUG 52 #ifdef NFS_DEBUG
53 void 53 void
54 nfs4_print_deviceid(const struct nfs4_deviceid 54 nfs4_print_deviceid(const struct nfs4_deviceid *id)
55 { 55 {
56 u32 *p = (u32 *)id; 56 u32 *p = (u32 *)id;
57 57
58 dprintk("%s: device id= [%x%x%x%x]\n", 58 dprintk("%s: device id= [%x%x%x%x]\n", __func__,
59 p[0], p[1], p[2], p[3]); 59 p[0], p[1], p[2], p[3]);
60 } 60 }
61 EXPORT_SYMBOL_GPL(nfs4_print_deviceid); 61 EXPORT_SYMBOL_GPL(nfs4_print_deviceid);
62 #endif 62 #endif
63 63
64 static inline u32 64 static inline u32
65 nfs4_deviceid_hash(const struct nfs4_deviceid 65 nfs4_deviceid_hash(const struct nfs4_deviceid *id)
66 { 66 {
67 unsigned char *cptr = (unsigned char * 67 unsigned char *cptr = (unsigned char *)id->data;
68 unsigned int nbytes = NFS4_DEVICEID4_S 68 unsigned int nbytes = NFS4_DEVICEID4_SIZE;
69 u32 x = 0; 69 u32 x = 0;
70 70
71 while (nbytes--) { 71 while (nbytes--) {
72 x *= 37; 72 x *= 37;
73 x += *cptr++; 73 x += *cptr++;
74 } 74 }
75 return x & NFS4_DEVICE_ID_HASH_MASK; 75 return x & NFS4_DEVICE_ID_HASH_MASK;
76 } 76 }
77 77
78 static struct nfs4_deviceid_node * 78 static struct nfs4_deviceid_node *
79 _lookup_deviceid(const struct pnfs_layoutdrive 79 _lookup_deviceid(const struct pnfs_layoutdriver_type *ld,
80 const struct nfs_client *clp, 80 const struct nfs_client *clp, const struct nfs4_deviceid *id,
81 long hash) 81 long hash)
82 { 82 {
83 struct nfs4_deviceid_node *d; 83 struct nfs4_deviceid_node *d;
84 84
85 hlist_for_each_entry_rcu(d, &nfs4_devi 85 hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[hash], node)
86 if (d->ld == ld && d->nfs_clie 86 if (d->ld == ld && d->nfs_client == clp &&
87 !memcmp(&d->deviceid, id, 87 !memcmp(&d->deviceid, id, sizeof(*id))) {
88 if (atomic_read(&d->re 88 if (atomic_read(&d->ref))
89 return d; 89 return d;
90 else 90 else
91 continue; 91 continue;
92 } 92 }
93 return NULL; 93 return NULL;
94 } 94 }
95 95
96 static struct nfs4_deviceid_node * 96 static struct nfs4_deviceid_node *
97 nfs4_get_device_info(struct nfs_server *server 97 nfs4_get_device_info(struct nfs_server *server,
98 const struct nfs4_deviceid *de 98 const struct nfs4_deviceid *dev_id,
99 const struct cred *cred, gfp_t 99 const struct cred *cred, gfp_t gfp_flags)
100 { 100 {
101 struct nfs4_deviceid_node *d = NULL; 101 struct nfs4_deviceid_node *d = NULL;
102 struct pnfs_device *pdev = NULL; 102 struct pnfs_device *pdev = NULL;
103 struct page **pages = NULL; 103 struct page **pages = NULL;
104 u32 max_resp_sz; 104 u32 max_resp_sz;
105 int max_pages; 105 int max_pages;
106 int rc, i; 106 int rc, i;
107 107
108 /* 108 /*
109 * Use the session max response size a 109 * Use the session max response size as the basis for setting
110 * GETDEVICEINFO's maxcount 110 * GETDEVICEINFO's maxcount
111 */ 111 */
112 max_resp_sz = server->nfs_client->cl_s 112 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
113 max_pages = nfs_page_array_len(0, max_ 113 max_pages = nfs_page_array_len(0, max_resp_sz);
114 dprintk("%s: server %p max_resp_sz %u 114 dprintk("%s: server %p max_resp_sz %u max_pages %d\n",
115 __func__, server, max_resp_sz, 115 __func__, server, max_resp_sz, max_pages);
116 116
117 pdev = kzalloc(sizeof(*pdev), gfp_flag 117 pdev = kzalloc(sizeof(*pdev), gfp_flags);
118 if (!pdev) 118 if (!pdev)
119 return NULL; 119 return NULL;
120 120
121 pages = kcalloc(max_pages, sizeof(stru 121 pages = kcalloc(max_pages, sizeof(struct page *), gfp_flags);
122 if (!pages) 122 if (!pages)
123 goto out_free_pdev; 123 goto out_free_pdev;
124 124
125 for (i = 0; i < max_pages; i++) { 125 for (i = 0; i < max_pages; i++) {
126 pages[i] = alloc_page(gfp_flag 126 pages[i] = alloc_page(gfp_flags);
127 if (!pages[i]) 127 if (!pages[i])
128 goto out_free_pages; 128 goto out_free_pages;
129 } 129 }
130 130
131 memcpy(&pdev->dev_id, dev_id, sizeof(* 131 memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id));
132 pdev->layout_type = server->pnfs_curr_ 132 pdev->layout_type = server->pnfs_curr_ld->id;
133 pdev->pages = pages; 133 pdev->pages = pages;
134 pdev->pgbase = 0; 134 pdev->pgbase = 0;
135 pdev->pglen = max_resp_sz; 135 pdev->pglen = max_resp_sz;
136 pdev->mincount = 0; 136 pdev->mincount = 0;
137 pdev->maxcount = max_resp_sz - nfs41_m 137 pdev->maxcount = max_resp_sz - nfs41_maxgetdevinfo_overhead;
138 138
139 rc = nfs4_proc_getdeviceinfo(server, p 139 rc = nfs4_proc_getdeviceinfo(server, pdev, cred);
140 dprintk("%s getdevice info returns %d\ 140 dprintk("%s getdevice info returns %d\n", __func__, rc);
141 if (rc) 141 if (rc)
142 goto out_free_pages; 142 goto out_free_pages;
143 143
144 /* 144 /*
145 * Found new device, need to decode it 145 * Found new device, need to decode it and then add it to the
146 * list of known devices for this moun 146 * list of known devices for this mountpoint.
147 */ 147 */
148 d = server->pnfs_curr_ld->alloc_device 148 d = server->pnfs_curr_ld->alloc_deviceid_node(server, pdev,
149 gfp_flags); 149 gfp_flags);
150 if (d && pdev->nocache) 150 if (d && pdev->nocache)
151 set_bit(NFS_DEVICEID_NOCACHE, 151 set_bit(NFS_DEVICEID_NOCACHE, &d->flags);
152 152
153 out_free_pages: 153 out_free_pages:
154 while (--i >= 0) 154 while (--i >= 0)
155 __free_page(pages[i]); 155 __free_page(pages[i]);
156 kfree(pages); 156 kfree(pages);
157 out_free_pdev: 157 out_free_pdev:
158 kfree(pdev); 158 kfree(pdev);
159 dprintk("<-- %s d %p\n", __func__, d); 159 dprintk("<-- %s d %p\n", __func__, d);
160 return d; 160 return d;
161 } 161 }
162 162
163 /* 163 /*
164 * Lookup a deviceid in cache and get a refere 164 * Lookup a deviceid in cache and get a reference count on it if found
165 * 165 *
166 * @clp nfs_client associated with deviceid 166 * @clp nfs_client associated with deviceid
167 * @id deviceid to look up 167 * @id deviceid to look up
168 */ 168 */
169 static struct nfs4_deviceid_node * 169 static struct nfs4_deviceid_node *
170 __nfs4_find_get_deviceid(struct nfs_server *se 170 __nfs4_find_get_deviceid(struct nfs_server *server,
171 const struct nfs4_deviceid *id 171 const struct nfs4_deviceid *id, long hash)
172 { 172 {
173 struct nfs4_deviceid_node *d; 173 struct nfs4_deviceid_node *d;
174 174
175 rcu_read_lock(); 175 rcu_read_lock();
176 d = _lookup_deviceid(server->pnfs_curr 176 d = _lookup_deviceid(server->pnfs_curr_ld, server->nfs_client, id,
177 hash); 177 hash);
178 if (d != NULL && !atomic_inc_not_zero( 178 if (d != NULL && !atomic_inc_not_zero(&d->ref))
179 d = NULL; 179 d = NULL;
180 rcu_read_unlock(); 180 rcu_read_unlock();
181 return d; 181 return d;
182 } 182 }
183 183
184 struct nfs4_deviceid_node * 184 struct nfs4_deviceid_node *
185 nfs4_find_get_deviceid(struct nfs_server *serv 185 nfs4_find_get_deviceid(struct nfs_server *server,
186 const struct nfs4_deviceid *id 186 const struct nfs4_deviceid *id, const struct cred *cred,
187 gfp_t gfp_mask) 187 gfp_t gfp_mask)
188 { 188 {
189 long hash = nfs4_deviceid_hash(id); 189 long hash = nfs4_deviceid_hash(id);
190 struct nfs4_deviceid_node *d, *new; 190 struct nfs4_deviceid_node *d, *new;
191 191
192 d = __nfs4_find_get_deviceid(server, i 192 d = __nfs4_find_get_deviceid(server, id, hash);
193 if (d) 193 if (d)
194 goto found; 194 goto found;
195 195
196 new = nfs4_get_device_info(server, id, 196 new = nfs4_get_device_info(server, id, cred, gfp_mask);
197 if (!new) { 197 if (!new) {
198 trace_nfs4_find_deviceid(serve 198 trace_nfs4_find_deviceid(server, id, -ENOENT);
199 return new; 199 return new;
200 } 200 }
201 201
202 spin_lock(&nfs4_deviceid_lock); 202 spin_lock(&nfs4_deviceid_lock);
203 d = __nfs4_find_get_deviceid(server, i 203 d = __nfs4_find_get_deviceid(server, id, hash);
204 if (d) { 204 if (d) {
205 spin_unlock(&nfs4_deviceid_loc 205 spin_unlock(&nfs4_deviceid_lock);
206 server->pnfs_curr_ld->free_dev 206 server->pnfs_curr_ld->free_deviceid_node(new);
207 } else { 207 } else {
208 atomic_inc(&new->ref); 208 atomic_inc(&new->ref);
209 hlist_add_head_rcu(&new->node, 209 hlist_add_head_rcu(&new->node, &nfs4_deviceid_cache[hash]);
210 spin_unlock(&nfs4_deviceid_loc 210 spin_unlock(&nfs4_deviceid_lock);
211 d = new; 211 d = new;
212 } 212 }
213 found: 213 found:
214 trace_nfs4_find_deviceid(server, id, 0 214 trace_nfs4_find_deviceid(server, id, 0);
215 return d; 215 return d;
216 } 216 }
217 EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid); 217 EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid);
218 218
219 /* 219 /*
220 * Remove a deviceid from cache 220 * Remove a deviceid from cache
221 * 221 *
222 * @clp nfs_client associated with deviceid 222 * @clp nfs_client associated with deviceid
223 * @id the deviceid to unhash 223 * @id the deviceid to unhash
224 * 224 *
225 * @ret the unhashed node, if found and derefe 225 * @ret the unhashed node, if found and dereferenced to zero, NULL otherwise.
226 */ 226 */
227 void 227 void
228 nfs4_delete_deviceid(const struct pnfs_layoutd 228 nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *ld,
229 const struct nfs_clie 229 const struct nfs_client *clp, const struct nfs4_deviceid *id)
230 { 230 {
231 struct nfs4_deviceid_node *d; 231 struct nfs4_deviceid_node *d;
232 232
233 spin_lock(&nfs4_deviceid_lock); 233 spin_lock(&nfs4_deviceid_lock);
234 rcu_read_lock(); 234 rcu_read_lock();
235 d = _lookup_deviceid(ld, clp, id, nfs4 235 d = _lookup_deviceid(ld, clp, id, nfs4_deviceid_hash(id));
236 rcu_read_unlock(); 236 rcu_read_unlock();
237 if (!d) { 237 if (!d) {
238 spin_unlock(&nfs4_deviceid_loc 238 spin_unlock(&nfs4_deviceid_lock);
239 return; 239 return;
240 } 240 }
241 hlist_del_init_rcu(&d->node); 241 hlist_del_init_rcu(&d->node);
242 clear_bit(NFS_DEVICEID_NOCACHE, &d->fl 242 clear_bit(NFS_DEVICEID_NOCACHE, &d->flags);
243 spin_unlock(&nfs4_deviceid_lock); 243 spin_unlock(&nfs4_deviceid_lock);
244 244
245 /* balance the initial ref set in pnfs 245 /* balance the initial ref set in pnfs_insert_deviceid */
246 nfs4_put_deviceid_node(d); 246 nfs4_put_deviceid_node(d);
247 } 247 }
248 EXPORT_SYMBOL_GPL(nfs4_delete_deviceid); 248 EXPORT_SYMBOL_GPL(nfs4_delete_deviceid);
249 249
250 void 250 void
251 nfs4_init_deviceid_node(struct nfs4_deviceid_n 251 nfs4_init_deviceid_node(struct nfs4_deviceid_node *d, struct nfs_server *server,
252 const struct nfs4_devi 252 const struct nfs4_deviceid *id)
253 { 253 {
254 INIT_HLIST_NODE(&d->node); 254 INIT_HLIST_NODE(&d->node);
255 INIT_HLIST_NODE(&d->tmpnode); 255 INIT_HLIST_NODE(&d->tmpnode);
256 d->ld = server->pnfs_curr_ld; 256 d->ld = server->pnfs_curr_ld;
257 d->nfs_client = server->nfs_client; 257 d->nfs_client = server->nfs_client;
258 d->flags = 0; 258 d->flags = 0;
259 d->deviceid = *id; 259 d->deviceid = *id;
260 atomic_set(&d->ref, 1); 260 atomic_set(&d->ref, 1);
261 } 261 }
262 EXPORT_SYMBOL_GPL(nfs4_init_deviceid_node); 262 EXPORT_SYMBOL_GPL(nfs4_init_deviceid_node);
263 263
264 /* 264 /*
265 * Dereference a deviceid node and delete it w 265 * Dereference a deviceid node and delete it when its reference count drops
266 * to zero. 266 * to zero.
267 * 267 *
268 * @d deviceid node to put 268 * @d deviceid node to put
269 * 269 *
270 * return true iff the node was deleted 270 * return true iff the node was deleted
271 * Note that since the test for d->ref == 0 is 271 * Note that since the test for d->ref == 0 is sufficient to establish
272 * that the node is no longer hashed in the gl 272 * that the node is no longer hashed in the global device id cache.
273 */ 273 */
274 bool 274 bool
275 nfs4_put_deviceid_node(struct nfs4_deviceid_no 275 nfs4_put_deviceid_node(struct nfs4_deviceid_node *d)
276 { 276 {
277 if (test_bit(NFS_DEVICEID_NOCACHE, &d- 277 if (test_bit(NFS_DEVICEID_NOCACHE, &d->flags)) {
278 if (atomic_add_unless(&d->ref, 278 if (atomic_add_unless(&d->ref, -1, 2))
279 return false; 279 return false;
280 nfs4_delete_deviceid(d->ld, d- 280 nfs4_delete_deviceid(d->ld, d->nfs_client, &d->deviceid);
281 } 281 }
282 if (!atomic_dec_and_test(&d->ref)) 282 if (!atomic_dec_and_test(&d->ref))
283 return false; 283 return false;
284 trace_nfs4_deviceid_free(d->nfs_client 284 trace_nfs4_deviceid_free(d->nfs_client, &d->deviceid);
285 d->ld->free_deviceid_node(d); 285 d->ld->free_deviceid_node(d);
286 return true; 286 return true;
287 } 287 }
288 EXPORT_SYMBOL_GPL(nfs4_put_deviceid_node); 288 EXPORT_SYMBOL_GPL(nfs4_put_deviceid_node);
289 289
290 void 290 void
291 nfs4_mark_deviceid_available(struct nfs4_devic 291 nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node)
292 { 292 {
293 if (test_bit(NFS_DEVICEID_UNAVAILABLE, 293 if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) {
294 clear_bit(NFS_DEVICEID_UNAVAIL 294 clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
295 smp_mb__after_atomic(); 295 smp_mb__after_atomic();
296 } 296 }
297 } 297 }
298 EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_available 298 EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_available);
299 299
300 void 300 void
301 nfs4_mark_deviceid_unavailable(struct nfs4_dev 301 nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node)
302 { 302 {
303 node->timestamp_unavailable = jiffies; 303 node->timestamp_unavailable = jiffies;
304 smp_mb__before_atomic(); 304 smp_mb__before_atomic();
305 set_bit(NFS_DEVICEID_UNAVAILABLE, &nod 305 set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
306 smp_mb__after_atomic(); 306 smp_mb__after_atomic();
307 } 307 }
308 EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailab 308 EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable);
309 309
310 bool 310 bool
311 nfs4_test_deviceid_unavailable(struct nfs4_dev 311 nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node)
312 { 312 {
313 if (test_bit(NFS_DEVICEID_UNAVAILABLE, 313 if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) {
314 unsigned long start, end; 314 unsigned long start, end;
315 315
316 end = jiffies; 316 end = jiffies;
317 start = end - PNFS_DEVICE_RETR 317 start = end - PNFS_DEVICE_RETRY_TIMEOUT;
318 if (time_in_range(node->timest 318 if (time_in_range(node->timestamp_unavailable, start, end))
319 return true; 319 return true;
320 clear_bit(NFS_DEVICEID_UNAVAIL 320 clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
321 smp_mb__after_atomic(); 321 smp_mb__after_atomic();
322 } 322 }
323 return false; 323 return false;
324 } 324 }
325 EXPORT_SYMBOL_GPL(nfs4_test_deviceid_unavailab 325 EXPORT_SYMBOL_GPL(nfs4_test_deviceid_unavailable);
326 326
327 static void 327 static void
328 _deviceid_purge_client(const struct nfs_client 328 _deviceid_purge_client(const struct nfs_client *clp, long hash)
329 { 329 {
330 struct nfs4_deviceid_node *d; 330 struct nfs4_deviceid_node *d;
331 HLIST_HEAD(tmp); 331 HLIST_HEAD(tmp);
332 332
333 spin_lock(&nfs4_deviceid_lock); 333 spin_lock(&nfs4_deviceid_lock);
334 rcu_read_lock(); 334 rcu_read_lock();
335 hlist_for_each_entry_rcu(d, &nfs4_devi 335 hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[hash], node)
336 if (d->nfs_client == clp && at 336 if (d->nfs_client == clp && atomic_read(&d->ref)) {
337 hlist_del_init_rcu(&d- 337 hlist_del_init_rcu(&d->node);
338 hlist_add_head(&d->tmp 338 hlist_add_head(&d->tmpnode, &tmp);
339 clear_bit(NFS_DEVICEID 339 clear_bit(NFS_DEVICEID_NOCACHE, &d->flags);
340 } 340 }
341 rcu_read_unlock(); 341 rcu_read_unlock();
342 spin_unlock(&nfs4_deviceid_lock); 342 spin_unlock(&nfs4_deviceid_lock);
343 343
344 if (hlist_empty(&tmp)) 344 if (hlist_empty(&tmp))
345 return; 345 return;
346 346
347 while (!hlist_empty(&tmp)) { 347 while (!hlist_empty(&tmp)) {
348 d = hlist_entry(tmp.first, str 348 d = hlist_entry(tmp.first, struct nfs4_deviceid_node, tmpnode);
349 hlist_del(&d->tmpnode); 349 hlist_del(&d->tmpnode);
350 nfs4_put_deviceid_node(d); 350 nfs4_put_deviceid_node(d);
351 } 351 }
352 } 352 }
353 353
354 void 354 void
355 nfs4_deviceid_purge_client(const struct nfs_cl 355 nfs4_deviceid_purge_client(const struct nfs_client *clp)
356 { 356 {
357 long h; 357 long h;
358 358
359 if (!(clp->cl_exchange_flags & EXCHGID 359 if (!(clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_MDS))
360 return; 360 return;
361 for (h = 0; h < NFS4_DEVICE_ID_HASH_SI 361 for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++)
362 _deviceid_purge_client(clp, h) 362 _deviceid_purge_client(clp, h);
363 } 363 }
364 364
365 /* 365 /*
366 * Stop use of all deviceids associated with a 366 * Stop use of all deviceids associated with an nfs_client
367 */ 367 */
368 void 368 void
369 nfs4_deviceid_mark_client_invalid(struct nfs_c 369 nfs4_deviceid_mark_client_invalid(struct nfs_client *clp)
370 { 370 {
371 struct nfs4_deviceid_node *d; 371 struct nfs4_deviceid_node *d;
372 int i; 372 int i;
373 373
374 rcu_read_lock(); 374 rcu_read_lock();
375 for (i = 0; i < NFS4_DEVICE_ID_HASH_SI 375 for (i = 0; i < NFS4_DEVICE_ID_HASH_SIZE; i ++){
376 hlist_for_each_entry_rcu(d, &n 376 hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[i], node)
377 if (d->nfs_client == c 377 if (d->nfs_client == clp)
378 set_bit(NFS_DE 378 set_bit(NFS_DEVICEID_INVALID, &d->flags);
379 } 379 }
380 rcu_read_unlock(); 380 rcu_read_unlock();
381 } 381 }
382 382
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